net/vmw_vsock/vmci_transport_notify.h

   1 /*
   2  * VMware vSockets Driver
   3  *
   4  * Copyright (C) 2009-2013 VMware, Inc. All rights reserved.
   5  *
   6  * This program is free software; you can redistribute it and/or modify it
   7  * under the terms of the GNU General Public License as published by the Free
   8  * Software Foundation version 2 and no later version.
   9  *
  10  * This program is distributed in the hope that it will be useful, but WITHOUT
  11  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  12  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
  13  * more details.
  14  */
  15
  16 #ifndef __VMCI_TRANSPORT_NOTIFY_H__
  17 #define __VMCI_TRANSPORT_NOTIFY_H__
  18
  19 #include <linux/types.h>
  20 #include <linux/vmw_vmci_defs.h>
  21 #include <linux/vmw_vmci_api.h>
  22 #include <linux/vm_sockets.h>
  23
  24 #include "vmci_transport.h"
  25
  26 /* Comment this out to compare with old protocol. */
  27 #define VSOCK_OPTIMIZATION_WAITING_NOTIFY 1
  28 #if defined(VSOCK_OPTIMIZATION_WAITING_NOTIFY)
  29 /* Comment this out to remove flow control for "new" protocol */
  30 #define VSOCK_OPTIMIZATION_FLOW_CONTROL 1
  31 #endif
  32
  33 #define VMCI_TRANSPORT_MAX_DGRAM_RESENDS       10
  34
  35 struct vmci_transport_recv_notify_data {
  36         u64 consume_head;
  37         u64 produce_tail;
  38         bool notify_on_block;
  39 };
  40
  41 struct vmci_transport_send_notify_data {
  42         u64 consume_head;
  43         u64 produce_tail;
  44 };
  45
  46 /* Socket notification callbacks. */
  47 struct vmci_transport_notify_ops {
  48         void (*socket_init) (struct sock *sk);
  49         void (*socket_destruct) (struct vsock_sock *vsk);
  50         int (*poll_in) (struct sock *sk, size_t target,
  51                           bool *data_ready_now);
  52         int (*poll_out) (struct sock *sk, size_t target,
  53                            bool *space_avail_now);
  54         void (*handle_notify_pkt) (struct sock *sk,
  55                                    struct vmci_transport_packet *pkt,
  56                                    bool bottom_half, struct sockaddr_vm *dst,
  57                                    struct sockaddr_vm *src,
  58                                    bool *pkt_processed);
  59         int (*recv_init) (struct sock *sk, size_t target,
  60                           struct vmci_transport_recv_notify_data *data);
  61         int (*recv_pre_block) (struct sock *sk, size_t target,
  62                                struct vmci_transport_recv_notify_data *data);
  63         int (*recv_pre_dequeue) (struct sock *sk, size_t target,
  64                                  struct vmci_transport_recv_notify_data *data);
  65         int (*recv_post_dequeue) (struct sock *sk, size_t target,
  66                                   ssize_t copied, bool data_read,
  67                                   struct vmci_transport_recv_notify_data *data);
  68         int (*send_init) (struct sock *sk,
  69                           struct vmci_transport_send_notify_data *data);
  70         int (*send_pre_block) (struct sock *sk,
  71                                struct vmci_transport_send_notify_data *data);
  72         int (*send_pre_enqueue) (struct sock *sk,
  73                                  struct vmci_transport_send_notify_data *data);
  74         int (*send_post_enqueue) (struct sock *sk, ssize_t written,
  75                                   struct vmci_transport_send_notify_data *data);
  76         void (*process_request) (struct sock *sk);
  77         void (*process_negotiate) (struct sock *sk);
  78 };
  79
  80 extern struct vmci_transport_notify_ops vmci_transport_notify_pkt_ops;
  81 extern struct vmci_transport_notify_ops vmci_transport_notify_pkt_q_state_ops;
  82
  83 #endif /* __VMCI_TRANSPORT_NOTIFY_H__ */